Support for multiple calendars
Support for multiple calendars, e.g. Multiple Google Calendars from one Google account, would be very useful.
This is a consumer feature, and a better fit on http://windowsphone.uservoice.com/ – but works on Windows Phone.
Thomas Adams commented
I find it wrong to flag this as a user request as a developer can also not access multiple calendars of an account which would be VERY NICE if it worked!